Anvar A. Zakhidov

Bio: Anvar A. Zakhidov is an academic researcher from University of Texas at Dallas. The author has contributed to research in topics: Perovskite (structure) & Carbon nanotube. The author has an hindex of 63, co-authored 417 publications receiving 27644 citations. Previous affiliations of Anvar A. Zakhidov include University of Texas System & Business International Corporation.

Microwave heating effect on two Josephson-junction systems in granular PAT12C60Rb composites: low-field microwave absorption study

Abstract: The low-field microwave absorption in poly(3-alkylthiophene) composites with fullerene C 60 doped by alkali metals revealed multipeak spectra, with two signals appearing at different critical temperature. The superconducting phase consists of three components: out-of-phase, narrow in-phase and broad in in-phase. The behavior of the out-of-phase component with microwave power is in good agreement with the overheating model of a Josephson junction system. The narrow in-phase signal observed at low microwave power at the lowest temperatures supports the existence of π-junctions. The behavior of the peak position of the broad in-phase signal with temperature and microwave power is explained by the RSJ model, which suggests that the broad in-phase signal originates from a SNS junction.

Silver Nanowires on Carbon Nanotube Aerogel Sheets for Flexible, Transparent Electrodes

Abstract: Flexible, free-standing transparent conducting electrodes (TCEs) with simultaneously tunable transmittances up to 98% and sheet resistances down to 11 {\Omega}/sq were prepared by a facile spray-coating method of silver nanowires (AgNWs) onto dry-spun multiwall carbon nanotube (MWNT) aerogels. Counterintuitively, the transmittance of the hybrid electrodes can be increased as the mass density of AgNWs within the MWNT aerogels increase, however, the final achievable transmittance depends on the initial transparency of the MWNT aerogels. At the same time, a strong decrease in sheet resistance is obtained when AgNWs form a percolated network along the MWNT aerogel. Additionally, anisotropic reduction in sheet resistance and polarized transmittance of AgNWs/MWNTs aerogel is achieved with this method. The final AgNWs/MWNTs hybrid TCEs transmittance and sheet resistance can be fine-tuned by spray-coating mechanisms or by the choice of initial MWNT aerogel density. Thus, a wide range of AgNWs/MWNTs hybrid TCEs with optimized optoelectronic properties can be achieved depending of the requirements needed. Finally, the free-standing AgNWs/MWNTs hybrid TCEs can be laminated onto a wide range of substrates without the need of a bonding aid.

Thermopower enhancement and optimal ZT in p-n junction arrays

Abstract: Thermoelectric effects in different types of p-n junction systems are considered theoretically, and the thermoelectric power S is calculated in a rigorous approximation. S for a single p-n junction is found to be rather large, due to the thermal factor E/sub g//kT (E/sub g/ being the band gap). This factor naturally appears in the expression for S for an asymmetric junction, and cancels from S for a symmetric junction. The thermopower of individual p-n junctions (S/sub n/) add for an array of in-series junctions (-p-n-p-n-p-...), and this result may be used for the enhancement of the Seebeck coefficient in opal-type 3-D superlattices. The figure of merit ZT of the p-n junction system is shown to have an upper bound of 1.

Electric Field Effect in Atomically Thin Carbon Films

Abstract: We describe monocrystalline graphitic films, which are a few atoms thick but are nonetheless stable under ambient conditions, metallic, and of remarkably high quality. The films are found to be a two-dimensional semimetal with a tiny overlap between valence and conductance bands, and they exhibit a strong ambipolar electric field effect such that electrons and holes in concentrations up to 10 13 per square centimeter and with room-temperature mobilities of ∼10,000 square centimeters per volt-second can be induced by applying gate voltage.

疟原虫var基因转换速率变化导致抗原变异[英]／Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A

Abstract: 抗原变异可使得多种致病微生物易于逃避宿主免疫应答。表达在感染红细胞表面的恶性疟原虫红细胞表面蛋白1（PfPMP1）与感染红细胞、内皮细胞、树突状细胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作用。每个单倍体基因组var基因家族编码约60种成员，通过启动转录不同的var基因变异体为抗原变异提供了分子基础。

Carbon Nanotubes--the Route Toward Applications

Abstract: Many potential applications have been proposed for carbon nanotubes, including conductive and high-strength composites; energy storage and energy conversion devices; sensors; field emission displays and radiation sources; hydrogen storage media; and nanometer-sized semiconductor devices, probes, and interconnects. Some of these applications are now realized in products. Others are demonstrated in early to advanced devices, and one, hydrogen storage, is clouded by controversy. Nanotube cost, polydispersity in nanotube type, and limitations in processing and assembly methods are important barriers for some applications of single-walled nanotubes.